Title :
Soft dropping power control-a power control backoff strategy
Author :
Gupta, Sorabh ; Yates, Roy D. ; Rose, Christopher
Author_Institution :
Wireless Inf. Network Lab., Rutgers Univ., Piscataway, NJ, USA
Abstract :
For wireless communications systems, this work considers a power control algorithm in which a user´s link quality objective, as measured by the signal to interference ratio (SIR), varies with its transmitter power. In particular, as increased interference or reduced uplink gain leads a mobile to raise its transmitter power, that mobile lowers its SIR target. In this way, the likelihood of an infeasible power control problem in which the users´ transmitter powers rise to a maximum, is reduced. This graceful degradation of the SIR is termed soft dropping. Convergence proofs for a soft dropping power control algorithm are presented. Simulation results for a generic CDMA system demonstrate performance improvements over fixed target SIR algorithms
Keywords :
cellular radio; code division multiple access; convergence of numerical methods; land mobile radio; power control; radio links; radiofrequency interference; telecommunication control; CDMA system; admission control; cellular communications; convergence; fixed target SIR algorithms; interference; link quality; performance; power control algorithm; power control backoff; signal to interference ratio; simulation results; soft dropping power control; transmitter power; uplink gain; wireless communications systems; Base stations; Degradation; Integrated circuit noise; Interference constraints; Laboratories; Multiaccess communication; Power control; Power measurement; Transmitters; Wireless communication;
Conference_Titel :
Personal Wireless Communications, 1997 IEEE International Conference on
Conference_Location :
Mumbai
Print_ISBN :
0-7803-4298-4
DOI :
10.1109/ICPWC.1997.655510